For example, " B . burgdorferi sensu lato " was previously thought to be hindered in its ability to be maintained in an enzootic cycle in California, because it was assumed the large lizard population would dilute the prevalence of " B . burgdorferi " in local tick populations; this has since been brought into question, as some evidence has suggested lizards can become infected.
42.
From 1908 until the 1950s, after which many enzootic and epizootic diseases had been exterminated or controlled, Onderstepoort revealed the etiology and provenance of diseases such as " lamsiekte ", " geeldikkop " ( a photodynamic disease of southern African sheep, caused by the ingestion of certain plants and a consequent sensitisation to light, causing intense jaundice and facial edema ) and African horsesickness, and produced vaccines, some of which were globally adopted.
